Living in London, we often pop over the Channel to Northern France and have had some great meals. Non of them are *that* recent, so I won't go into great detail.
Chateau de Montreuil (Montreuil sur Mer). Michelin starred restaurant with great food and fantastic service. What I like about this place is that it's quite old-fashioned, and yet not reverential. The staff are very correct, but maintain a sense of humour throughout (maybe partly because we're younger than the average diner). The sommelier and maitre d' have been there for a long time and give great advice. The cheese board is to die for. The chef, Christian Germain, cooks classic French food using seasonal ingredients. It's not without creativity though - a version of Heston Blumenthal's snail porridge was on the menu last time we were there. A meal here will set you back at least 100 Euros, but it's totally worth it.
Le Clos des Capucins, Montreuil sur Mer. Solid French food at a reasonable price
La Clé des Champs (Favieres, near Le Crotoy). This is a complete gem of a place in the countryside near the little seaside town of Le Crotoy. It has a bib gourmand, which means good food at reasonable prices. We went for Sunday lunch on my birthday last year and had the most expensive menu (about 40 Euros if I remember). It was a fabulous meal.
Nausicaa (Boulogne sur Mer). This was a pleasant surprise. We'd been to the Aquarium in Boulogne (great fun) and didn't have time to go back into town for lunch so decided to eat in the attached restaurant. We weren't expecting much, but our meal was terrific, and the view wasn't bad either (it's right on the beach). I think it's run by the same people who own La Matelote, a Michelin starred joint that we have yet to visit.
Chez Léon, Boulogne sur Mer. A classic brasserie with well-executed dishes and friendly staff.
We off again in a few weeks and will be visiting Auberge de la Grenouillere - recently Michelin starred and with a hot new chef. It was even mentioned by Gordon Ramsay in his Times column last year. I will report back.